Fixes last of the seams issues (I hope); flickering pixels
The background of the engine is no longer cleared on redrawing. Any remaining stray pixels will now remain unchanged, so you no longer see the background color.*

Changes the way 'flat' images are handled in simple mode.
Try throwing a non-panoramic image on the SPi-V standalone viewer... 'Flat' images are now displayed as low fov images, effectively making the SPi-V engine a nice zooming image viewer.

*: This is quite a big change, and will cause some content to look odd... A semi-transparent (ui or pano) element that is over a part of the scene that is not covered by an underlying element will seemingly lose its transparency, as it gets drawn over itself repeatedly. This is most notable with partial panoramas, or scenes with scenes with incorrectly set cameralimits.

Fixes compatibility issues with some of the scriptlets.
The saver scriptlet (and the toolbar) should now work with both 1.2.x and 1.3 beta of the viewer. Both the saver and toolbar scriptlets were updated, so if you intend to use these scriptlets with the beta, download them from the downloads page.